EGU General Assembly 2020
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the Creative Commons Attribution 4.0 License.

A reduced-order model of the zonal jets problem in the Southern Ocean

Elnaz Naghibi1, Sergey Karabasov2, and Igor Kamenkovich3
Elnaz Naghibi et al.
  • 1Imperial College London, Department of Aeronautics, United Kingdom of Great Britain and Northern Ireland (
  • 2Queen Mary University of London
  • 3University of Miami

We introduce a reduced-order model of the underlying dynamics of zonal jets in the Southern Ocean. The model is based on multi-scale decomposition in the vorticity equation and explains how large-scale forcing breaks down into mesoscale eddies and alternating zonal jets. In this reduced-order model, we average the vorticity equation both in time and in the zonal direction and utilize eddy viscosity parametrization for turbulence closure. For verification, we compare our results with two high-fidelity models: i) the quasi-geostrophic model of a shear-driven periodic channel flow and ii) primitive equation HYCOM (HYbrid Coordinate Ocean Model) simulations of the Southern Ocean.

How to cite: Naghibi, E., Karabasov, S., and Kamenkovich, I.: A reduced-order model of the zonal jets problem in the Southern Ocean, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-20799,, 2020

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